Study of allelopathic effects of sesame (Sesamum indicum) on canola (Brassica napus) growth and germination

In the course of a laboratorial study that accomplished on the basis on a factorial layout within completely randomized design with four replications in 2008. Treatments include leaf, root, stem and flower extract. Each extract includes 4 levels 0%, 25%, 50% and 100%. The effects of sesame extract density on germination rate, germination percent, coleoptile weight, radicle length and coleoptile length were significant. The effects of plant organ on germination rate, radicle weight, radicle length and coleoptile length were significant. The interaction between sesame extract densities and plant organ was significant effect on germination rate, coleoptile weight, radicle weigth, radicle length and coleoptile length. The conclusions demonstrated that Brassica napus sensitized to exuding allelochemical materials form sesame and the rate of germination and percentage of germination, seedling weight, coleoptile length, radicle length and brassica napus decreased by increasing density of extracts.